JPH0338004Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a suspension suspension used to receive one end of a coil spring at the attachment point of a strut mount member constituting a vehicle strut-type suspension device to a vehicle body. This invention relates to spring seat rubber for shock absorbers.

(Prior Art) Vehicles such as automobiles are usually equipped with a suspension device in order to reduce vibrations received by the wheels of the vehicle from being transmitted to the vehicle body. Among these, strut-type suspension devices have a telescopic strut between the vehicle body and the wheels suspended on the vehicle body, and as the vehicle runs, various vibrations are transmitted to the vehicle body through this strut. Therefore, a strut mount member is attached to the part where the strut is attached to the vehicle body for the purpose of vibration isolation. An example of a strut-type suspension device in which such a strut mount member is mounted with a configuration that can be made relatively compact is the one described in Japanese Utility Model Application Publication No. 55-24520. be. The strut-type suspension device described in this publication includes a cylindrical holding member having an attachment portion to the vehicle body, an inner cylinder connected to the strut, and an integrally sandwiched between the cylindrical holding member and the inner cylinder. a rubber elastic body, an outward facing collar body is provided at the lower part of the inner cylinder, and a spring seat covering the outward facing collar body is provided at the lower part of the cylindrical holding member, and a spring seat is provided at the lower part of the cylindrical holding member to cover the outward facing collar body. The structure is such that a rubber elastic body is sandwiched between the rubber elastic bodies in a compressed state.

However, in a strut-type suspension device equipped with the above-mentioned strut mount member, the attachment part of the cylindrical holding member to the vehicle body is subject to vibrations as the vehicle runs. A gap was created between the cylindrical holding member and the vehicle body, which is the joint between the mount member and the vehicle body, and there was a risk that water and dust could enter the interior through the gap. In particular, when this strut-type suspension device is applied to a rear suspension, the strut mount member is connected to the body part that partitions the interior and exterior of the vehicle, which prevents not only water and dust from entering the vehicle but also noise directly from entering the vehicle. There is a risk of infiltration.

One way to solve this problem is to apply a sealing material to the joint between the strut mount member and the vehicle body, but normal sealing material completely prevents water and dust from entering. It is difficult to do so, and there are problems in terms of reliability and cost, and there are also drawbacks such as a reduction in the tightening force of the bolts that connect the strut mount member and the vehicle body.

(Purpose of the invention) In view of the above, the present invention provides a strut-type suspension device in which a strut mount member is attached to the upper end of the strut, without making any changes to other parts constituting the strut mount member. Provides a spring seat rubber for a suspension device that can be used to prevent water and dust from entering from outside the vehicle through the gap created between the cylindrical holding member that holds the strut member and the vehicle body. The purpose is to

(Structure of the invention) The spring seat rubber of the suspension device according to the invention is located on the lower surface of the joint between the strut mount member and the vehicle body, which has an inner cylinder portion into which the upper end of the strut member is inserted and connected. It is fixed to the vehicle body together with the strut mount member by bolts, and has a through hole with a diameter smaller than the diameter of the lower end opening in the inner cylinder of the strut mount member, and is fitted to the strut member. between a dish-shaped spring seat proximate to the lower end opening of the inner cylindrical portion of the member and the other end of a coil spring having one end fixed to the strut member and disposed so as to surround the strut member; A cylindrical part that is formed into an annular shape from a flexible material and serves as a positioning part for the coil spring in the spring seat, and a flange part for attaching to the vehicle body that is bent outward from the upper end of the cylindrical part. It has a cross-sectional shape and is clamped. The outer peripheral edge of the strut mount member forms a seal lip that is brought into pressure contact with the vehicle body at a position outward from the joint between the strut mount member and the vehicle body. This is so that it is possible to prevent foreign matter from entering through the joint between the strut mount member and the vehicle body.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an overview of a strut-type rear suspension device to which an example of the spring seat rubber of the suspension device according to the present invention is applied.
FIG. 2 is a side view with a part of the vehicle body cut away, and FIG. 2 is a sectional view showing details of section A in FIG. 1. In the figure, a wheel support member 1a that rotatably supports a wheel 1 and a subframe 2 are connected by two lateral links 3, front and rear. The lower end of the strut member 4 is fixed to the wheel support member 1a. This strut member 4 is equipped with a cylinder type oil damper 4a to reduce vibration and impact from the wheel 1.
The oil damper 4a has a piston (not shown) slidably fitted into the cylinder of the oil damper 4a, and a rod portion 4b extending upward from the piston. And the strut member 4
In order to attach the upper end of the rod part 4 to the vehicle body 5,
A mount member 6 is connected to the upper end of b with a nut 7. This mount member 6 has a cylindrical holding member 8 formed with a flange portion 8a, which is a connection portion with the vehicle body 5, and a bottom portion, which is a connection portion with a rod portion 4b, which are joined back to back, and are arranged upwardly and downwardly, respectively. Two bottomed cylindrical inner cylinders 9 and 1 open to the
0, and a cylindrical rubber 11 which is sandwiched between the inner cylinders 9 and 10 and the cylindrical holding member 8 in a compressed state. The rubber 11 is made of a flexible elastic material and reduces vibrations and shocks transmitted from the strut member 4 to the vehicle body 5.

Further, the inner wall surface 5a of the vehicle body 5 is in contact with the upper surface of the flange portion 8a so as to sandwich the flange portion 8a of the cylindrical holding member 8, and the inner wall surface 5a of the vehicle body 5 is in contact with the upper surface of the flange portion 8a. The spring has a through hole 12b having a diameter smaller than the diameter of the lower end opening 10a of the inner cylinder 10 of the mount member 6, and is fitted into the rod portion 4b so as to be brought close to the lower end opening 10a of the inner cylinder 10 of the mount member 6. A flange portion 12a bent horizontally from the upper end of the cylindrical portion of the seat 12 is in contact with the flange portion 8a of the cylindrical holding member 8, the vehicle body 5, and the flange portion 12 of the spring seat 12.
The three parts a are connected by bolts 13 and nuts 14 like a sandwich. In addition, bolt 13
If the head of the spring seat 12 is fixed in advance to the flange portion 12a of the spring seat 12 by welding or the like, a decrease in the tightening force can be suppressed.

Then, the flange portion 8 of the above-mentioned cylindrical holding member 8
a. Below the joint of the vehicle body 5 and the flange portion 12a of the spring seat 12, a spring seat rubber 15 according to the present invention is fixed at one end to the flange portion 12a of the spring seat 12 to the strut member 4. Along with this, the strut member 4
The coil spring 16 is sandwiched and fixed between the other end of the coil spring 16 surrounding the upper part of the coil spring 16. As shown in FIG. 3, this spring seat rubber 15 has a substantially L-shaped cross section and is sandwiched between the coil spring 16 and the spring seat 12 at a clamping portion 15a.
and a seal lip portion 15b having a tongue-shaped cross section that extends slightly upwardly outward from the clamping portion 15a and comes into pressure contact with the vehicle body 5, and is integrally formed in an annular shape from a flexible material such as rubber. , spring seat 1
The seal lip portion 15b is attached so as to be bent slightly upward.

The spring seat rubber 15 mounted in this manner is located within the annular air space formed by the spring seat 12 and the vehicle body 5, and is located on the inner wall surface 5 of the vehicle body 5.
The seal lip portion 15b is in pressure contact with a.
Therefore, water, dust, or noise from the outside that attempts to enter the vehicle from the joint between the flange portion 8a of the cylindrical holding member 8 and the vehicle body 5 has its entry path blocked by the spring seat rubber 15. Infiltration is prevented. Furthermore, even if the distance between the spring seat 12 and the vehicle body 5 changes somewhat due to vibrations or shocks transmitted from the strut member 4 to the vehicle body 5, the spring seat rubber 15 remains attached to the spring seat 12 and , is pressed against the flange portion 12a by the elasticity of the coil spring 16, and is made of a flexible material, so that it will not shift in position.
Furthermore, the seal lip portion 15b swings inwardly or outwardly to follow the fluctuation, absorbing the separation fluctuation, and the state of pressure contact with the vehicle body 5 is not released.

In the above example, the seal lip portion 15b of the spring seat rubber 15 is formed slightly upward, but the seal lip portion 15b may be formed upward, as shown in FIG. 4, for example. As shown in FIG. 5, the seal lip portion 15b is formed to face approximately horizontally,
Attach by folding it so that it faces upward or downward,
It is also possible to make it come into pressure contact with the vehicle body 5.

Furthermore, although the above embodiments were applied to a strut-type rear suspension device, the present invention can also be applied to a strut-type front suspension device.

(Effect of the invention) As is clear from the above explanation, the spring seat rubber of the suspension device according to the invention has its outer peripheral edge located outward from the joint between the strut mount member and the vehicle body. Since the spring seat rubber of the suspension device according to the present invention forms a seal lip that is brought into pressure contact with the vehicle body,
Without making any changes to other parts constituting the strut-type suspension device, the lower part of the inner cylinder part of the strut mount member, which is located close to the fitting part of the dish-shaped spring seat with the strut member, allows While maintaining a configuration that prevents water, dust, etc. from entering from the fitting part of the dish-shaped spring seat with the strut member,
It is possible to prevent water, dust, etc. from entering the vehicle from the joint between the strut mount member and the vehicle body before the joint. In addition, the spring seat rubber of the suspension device according to the present invention is advantageous in terms of production costs, etc., since the seat lip part is integrally formed with the clamping part that has the original function of the spring seat rubber. Even if the distance between the spring seat and the car body changes slightly due to vibrations, etc., the dimensional change can be absorbed and the state of pressure contact with the car body can be maintained continuously, so it is reliable in preventing water, dust, etc. from entering the car interior. It is also excellent from this point of view.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an outline of a strut-type suspension device to which an example of the spring seat rubber of the suspension device according to the present invention is applied, and Fig. 2 is an enlarged view of section A in Fig. 1. FIG. 3 is a sectional view showing an example of the spring seat rubber of the suspension device according to the present invention, FIG. 3 is a sectional view showing the natural state of the spring seat rubber shown in FIG. 2, and FIGS. The figure is a sectional view showing another embodiment of the spring seat rubber of the suspension device according to the present invention. In the figure, 4 is a strut member, 5 is a vehicle body, 6 is a mount member, 8 is a cylindrical holding member, 12 is a spring seat, 15 is a spring seat rubber, 15
15b is a seal lip portion, and 16 is a coil spring.

Claims (1)

[Scope of utility model registration request] A strut member whose upper end is inserted into the inner cylindrical part of the strut mount member and connected thereto, and whose lower end is connected to the wheel support member and is extendable and retractable; In the suspension device equipped with a coil spring, the strut mount member is fitted with a through hole having a diameter smaller than the diameter of the lower end opening of the inner cylinder portion of the strut mount member, and the strut mount member is fitted into the strut member. A spring seat and the coil are fixed to the vehicle body together with the strut mount member by bolts on the lower surface side of the joint between the strut mount member and the vehicle body, and are brought close to the lower end opening of the inner cylindrical portion of the strut mount member. a cylindrical part interposed between the upper end of the spring and formed in an annular shape of a flexible material and serving as a positioning part for the coil spring in the spring seat; It has a cross-sectional shape that follows the vehicle body mounting flange that is bent toward the direction, and the outer peripheral edge thereof is located outward from the joint between the strut mount member and the vehicle body. A spring seat rubber for a suspension device, characterized in that the spring seat rubber is formed with a seal lip portion that is brought into pressure contact with the vehicle body.